Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One ragweed plant can release as many as one billion grains of pollen!
51
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Sound travels fifteen times faster through steel than through air.
134
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Sound at the right vibration can bore holes through a solid object.
134
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65